NORWAY · WELLBORES · NPDID 6189
25/9-3
Exploration · Wildcat · P&A · Dry · Norwegian Energy Company ASA · PL 412
25/9-3 is a wildcat exploration wellbore in the North Sea, drilled by Norwegian Energy Company ASA, entered Aug 28, 2009, to 2,267 m in the Statfjord Gp.
- 2,267
- m total depth · 2,267 m vertical
- 121.5
- m water depth
- Aug 28, 2009
- entered · completed Sep 20, 2009
- Statfjord Gp
- at total depth · Early Jurassic
- —
- m of core
- —
- °C bottom-hole temperature
SODIR FACTPAGES · RECORD UPDATED FEB 20, 2026 · RELEASED SEP 20, 2011
On file for this wellbore
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Drilling
- Drilling facility
- WEST ALPHA · Semisub steel
- Drilling days
- 24
- Kelly bushing elevation
- 18 m
- Maximum inclination
- 1.39999998°
- Drilling permit
- 1269-L
- Licensing round
- TFO2006
- Plugged and abandoned
- —
- Core samples available
- Yes
- Cuttings samples available
- Yes
- Position · ED50
- 59.43473° N, 2.67858° E
Well history
WRITTEN BY THE NORWEGIAN OFFSHORE DIRECTORATE
General
Well 25/9-3 was drilled on the Tasta prospect in the Northern part of the Utsira High in the North Sea. The primary objective of the well was to test the hydrocarbon potential of the Middle Jurassic Hugin Formation.TD was to be set 50 m into the Statfjord Formation.
Operations and results
Wildcat well 25/9-3 was spudded with the semi-submersible installation West Alpha on 28 August 2009 and drilled to TD at 2267 m in the Early Jurassic Statfjord Formation. A 9 7/8" pilot hole was drilled from below the 30" shoe to the setting depth for the 13 3/8" casing at 1180 meters. No shallow gas was encountered at the well location. No significant problems were encountered in the operations. The well was drilled with hi-vis sweeps/seawater/bentonite mud down to 1180 m and with Glydril mud (2.5 - 3.5 % glycol) from 1180 m to TD.
The 8 1/2" section was drilled through a condensed sequence of Cretaceous sediments down to the Jurassic target, Hugin Formation. Top reservoir was encountered at 2103.4 m, 4 m shallower relative to prognosis. It had a gross thickness of approximately 10 m containing two sandstone units separated by a 1.8 m thick claystone/coal layer in the middle. Both sandstone sequences had good reservoir properties, but contained no hydrocarbons. The Statfjord Fm encountered at approximately 2218 m was found, as expected, water bearing. No shows of any sort were recorded in the well. Post-well geochemical analyses proved rich, but immature source rocks in the Draupne, Heather, Hugin and Statfjord formations.
No cores were cut and no wire line fluid samples were taken. At TD, a reduced dry hole case scenario logging program was performed.
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Around this wellbore
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About this data
Norwegian Offshore Directorate (Sodir) FactPages, mirrored nightly and used under the Norwegian Licence for Open Government Data (NLOD). Depths are metres along the wellbore from the kelly bushing unless a row gives its own unit; older cores are filed in feet. A zero the Directorate files for an unmeasured pressure, density, or temperature is shown as a dash.
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